BasePage Issue regarding Theme property setting

mat41 · July 6th, 2010, 08:01 PM

My runtime error is:

The 'Theme' property can only be set in or before the 'Page_PreInit' event

After implimenting the c# code chapter 6 page 227. This occurs when the following event handler is put in place:

this.PreRender += newEventHandler(Page_PreInt);

If thats commented out it runs. Here is my offending BasePage class:

Code:

publicclassBasePage : System.Web.UI.Page
{
privatevoid Page_PreRender(object sender, EventArgs e)
{
if (this.Title == "" || this.Title == null || this.Title.Length == 0)
{
thrownewException("Page title cannot be an empty string.");
}
}
privatevoid Page_PreInt(object sender, EventArgs e)
{
HttpCookie preferredTheme = Request.Cookies.Get("PreferredTheme");
if (preferredTheme != null)
{
Page.Theme = preferredTheme.Value;
}
}
public BasePage()
{
this.PreRender += newEventHandler(Page_PreRender);
this.PreRender += newEventHandler(Page_PreInt);
}
}

What have I done wrong?

TYIA

mat41 · July 6th, 2010, 08:51 PM

OMG those CODE tags mess things up....

Anyhow my mistake. The last line of the code should have been:

this.PreInit += newEventHandler(Page_PreInit);

Imar · July 7th, 2010, 02:57 AM

Hi Matt,

If you post colored code from Visual Studio, use the Remove Text Formatting button on the post editor before you wrap it in code tags. That should fix the issue.

Cheers,

Imar

mat41 · July 7th, 2010, 07:04 PM

Cheers Imar - I have never used these code tags before. Hopefully people havnt been to annoyed at my invlovement in the Classic area of Wrox simply pasting code directley over the years...

Imar · July 8th, 2010, 02:30 AM

You don't have to use them, but I think if you don't, indention gets lost. E.g. all double spaces are converted to just one, making code harder to read.

The fact the editor is so buggy doesn't make this any easier. You should be able to just post whatever you want, code tags or not...... ;-)

Cheers.

Imar